Feed-motion



(No Model.)

C. E. RING.

FEED MOTION. No. 357,415. Patented Feb. 8, 1887.

manner and by means well-known.

Y I lrrn V CHARLES E. RING, 0F SAGINAW@ MICHIGAN.

FEED-MOTION.

SPECIFICATION forming part of Letters Patent No. 357,415, dated February8, 1887.

Application tiled August 20, 1886. Serial No. 211,458. (No model.)

To @ZZ whom it may concern:

Be it known that I, CHARLEs E. RING, of Saginaw, in the county ofSaginaw and State of Michigan, have invented new and useful Improvementsin Feed-Motions; and I do hereby declare that the following is a full,clear, and eXact description thereof, reference being had to theaccompanying drawings, which forni a part of this specification.

This invention relates to new and useful improvements in feed-movementsfor reciprocating carriages, such as are used in different wood-workingmachines and other classes of machinery; and the invention consists inthe peculiar construction and arrangement of a spring draw-back, all ashereinafter more fully described. Y

In the drawings which accompany this specification, Figure l is aperspective view of the spring draw-back detached. Fig 2 is an elevationillustrating its application in connection with a carriage for thepurpose of retracting the same to its starting position after it hascompleted its forward motion.

A is a reciprocating carriage, which is propelled to its work by meansof a pinion, B, to which power is applied, and the rack-bar C, securedto the under side of the carriage, all

so arranged that after the desired forward movement is completed therack-bar is lifted out of engagement with the pinion, all in a Forinstance, in connection with the reciprocating carriage of ashingle-sawing machine, the usual way of returning such carriage to itsstarting-point has been by means of a weight attached to the end of4 achain which passes over a pulley and is connected at the other end tothe carriage, the weight being allowed to strike thelioor and hold thecarriage until the pinion again engages with the rack and propels thecarriage again forward. Such use of a weight for retracting the carriagehas been found objectionable for many reasons well known-such as onaccount of tliejar it creates, the strain on the pinion and other partsof the machine in starting and propelling the carriage forward, also onaccount of slack formed in the chain which cannot hold the carriageimmovablel enough when retracted. Io overcome these objections I have'contrived the following device: To a suitable standard or post, D, infront of the carriage, Ijournal the shaft E, to which is secured thewheel F and one end of the coil-spring G, all so arranged that byturning the wheel F in the direction of the arrow the tension of thecoil-spring is increased.

H is a strap provided with a hook or stirrup, I, by means of which it isadj ustably secured to the periphery of the wheel F, which, for thispurpose, is provided with a series of holes, J, in its rim.

K is an elongated cani, pivotally secured to the post D and providedwith a suitable clamp, L, for securing the strap H adjustably thereto.

The freey end ol' the strap H is secured to the carriage in any suitablemanner.

The parts being arranged and constructedas shown and described, theproper adjustment is obtained by placing the cam K in such position onthe post D that when in the position shown in Fig. 2 its lowest pointwill be in line with the carriage, the latter being in its retractedposition-that is, nearest the post D. Then the wheel F is turned in thedirection of the arrow until the required tension of the spring G isobtained, after which the strap is hooked to the rim of the wheel.

The object of the cam K is to exert the greatest strain on the springwhen the carriage is nearest the post and the pinion is detached fromits engagement with the carriage,thereby giving snfcient strain to holdthe carriage still until the pinion will engage with the carriage andpropel it. As the carriage advances the cam is oscillated by the strapand causes the tension of the spring to slacken, thereby giving thepinion less labor to do as the carriage advances to its work.

The spirit of my invention consists in retracting-the carriage byspring-power, the va riable action of which is modified by means of acam or equivalent device to increase the action of the spring by meansof increased leverage as the power of the spring decreases, and viceversa, and within this spirit the construction may be modified at willor to suit different circumstances.

Vhat I claim as my invention isl. In a feed-motion, the combination,with a reciprocating carriage, of the spring G, wheel F, strap II,attached at one end to said Wheel bearing on said strap, and adjustableclamp L and at the other to the carriage, and cam K, on said cani, allarranged to operate substanio operating on said strap, all arranged tooperate tiall y as described.

substantially as described.

2. In a feed-motion, the combination, with a reciprocating carriage, ofthe spring G, Wheel WVitnesses:

GHAS. E. RING.

F, having the adjusting-holes J, strap H, ha-V- H. S. SPRAGUE, ing hookI, engaging one of said holes, cam K, E. SCULLY.

